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Degradation of chlorinated phenols by a toluene enriched microbial culture

Biotransformations of several chlorinated phenols were studied in aerobic cultures enriched on glucose, methane, phenol and toluene and acclimated to 16 chlorinated compounds. The toluene enrichment culture degraded pentachlorophenol (PCP) and 2,4,6-trichlorophenol (2,4,6-TCP), while the cultures en...

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Published in:Water research (Oxford) 1994, Vol.28 (9), p.1897-1906
Main Authors: Ryding, John M., Puhakka, Jaakko A., Strand, Stuart E., Ferguson, John F.
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Language:English
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creator Ryding, John M.
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description Biotransformations of several chlorinated phenols were studied in aerobic cultures enriched on glucose, methane, phenol and toluene and acclimated to 16 chlorinated compounds. The toluene enrichment culture degraded pentachlorophenol (PCP) and 2,4,6-trichlorophenol (2,4,6-TCP), while the cultures enriched on glucose, methane or phenol showed little or no activity. The phenol and toluene enriched cultures rapidly degraded 2,4-dichlorophenol (2,4-DCP) but not 2,6-DCP or 2,4,5-TCP. Degradation of chlorophenols by the toluene enriched culture did not occur endogenously but continued when wnother carbon source, acetate, was introduced. Degradation of chlorophenols proceeded after starvation and in the presence of chloramphenicol, suggesting constitutive enzymatic activity. The initial steps of PCP degradation by the toluene enriched culture involved dechlorination and hydroxylation of an ortho carbon to form tetrachlorocatechol. Tetrachloroguaiacol was identified as a minor, dead-end metabolite of PCP degradation by the toluene enriched culture.
doi_str_mv 10.1016/0043-1354(94)90165-1
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subjects Biodegradation of pollutants
Biological and medical sciences
Biotechnology
chlorophenol
co-oxidation
dechlorination
Environment and pollution
Fundamental and applied biological sciences. Psychology
Industrial applications and implications. Economical aspects
methylation
oxygenase attack
phenol
toluene
title Degradation of chlorinated phenols by a toluene enriched microbial culture
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